Biomedical Simulation
Biomedical Simulation
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生物医学模拟
DOI：
10.1007/978-3-540-70521-5_22
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Figl M
中科院分区：
文献类型：
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作者：
Figl M
我们项目的总体目标是完全内窥镜冠状动脉搭桥术。这需要构建冠状动脉和心肌的 4D 术前模型。该模型必须与患者跳动心脏的内窥镜视图一致，并使用增强现实技术呈现给外科医生。我们建议可以根据冠状动脉 CT 构建模型。可以仅对心动周期的一个阶段进行分割，并使用非刚性配准传播到其他阶段。我们将这种方法产生的冠状动脉的位置与手动分割进行了比较。模型与患者内窥镜视图的配准分两个阶段实现。通过识别模型和视频之间的相应运动来执行时间配准。然后，我们计算两个达芬奇内窥镜视图之间的照片一致性以及运动模型帧的平均值。这已被证明可以改善成本函数的形状。呈现模型结果。然后可以将模型转换为校准的内窥镜视图，并使用两个视频混合器进行叠加。
The overall aim of our project is to guide totally endoscopic coronary artery bypass. This requires construction of a 4D preoperative model of the coronary arteries and myocardium. The model must be aligned with the endoscopic view of the patient’s beating heart and presented to the surgeon using augmented reality. We propose that the model can be constructed from coronary CT. Segmentation can be performed for one phase of the cardiac cycle only and propagated to the others using non-rigid registration. We have compared the location of the coronaries produced by this method to hand segmentation.Registration of the model to the endoscopic view of the patient is achieved in two phases. Temporal registration is performed by identification of corresponding motion between model and video. Then we calculate photo-consistency between the two da Vinci endoscope views and average over the frames of the motion model. This has been shown to improve the shape of the cost function. Phantom results are presented.The model can then be transformed to the calibrated endoscope view and overlaid using two video mixers.